diff --git a/appveyor.yml b/appveyor.yml
index 77d8a99e..3a972ab9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -91,7 +91,6 @@ on_failure:
       & $env:APPVEYOR_BUILD_FOLDER\appveyor-discord.ps1 failure $env:APPVEYOR_DISCORD_WEBHOOK_URL
 
 on_success:
-  - dotnet tool install --global NuKeeper
   - ps: .\update-dependencies.ps1
 
 cache:
diff --git a/update-dependencies.ps1 b/update-dependencies.ps1
index 618aeb1c..4ff1fb1b 100644
--- a/update-dependencies.ps1
+++ b/update-dependencies.ps1
@@ -23,7 +23,8 @@ else
                             "lib-Windows.Devices.Pwm",
                             "lib-Windows.Devices.Spi",
                             "lib-nanoFramework.Networking.Sntp",
-                            "lib-nanoFramework.Hardware.Stm32")
+                            "lib-nanoFramework.Hardware.Stm32",
+                            "lib-nanoFramework.System.Math")
 
     ForEach($library in $librariesToUpdate)
     {
@@ -46,30 +47,29 @@ else
         # find solution file in repository
         $solutionFile = (Get-ChildItem -Path ".\" -Include "*.sln" -Recurse)
 
-        # run NuKeeper inspect
-        if ($env:APPVEYOR_REPO_BRANCH -like '*release*' -or $env:APPVEYOR_REPO_BRANCH -like '*master*')
-        {
-            # use NuGet ONLY for release and master branches
-            $nukeeperInspect = NuKeeper inspect --source https://api.nuget.org/v3/index.json
-        }
-        else
-        {
-            # use NuGet and MyGet for all others
-            $nukeeperInspect = NuKeeper inspect
-        }
+        # find packages.config
+        $packagesConfig = (Get-ChildItem -Path ".\" -Include "packages.config" -Recurse)
+
+        # load packages.config as XML doc
+        [xml]$packagesDoc = Get-Content $packagesConfig
 
-        "NuGet update inspection result:" | Write-Host -ForegroundColor Cyan
-        $nukeeperInspect | Write-Host -ForegroundColor White
+        $nodes = $packagesDoc.SelectNodes("*").SelectNodes("*")
 
-        $packageCountMatch = [regex]::Match($nukeeperInspect, "Found (\d) possible updates").captures.groups[1].value
-        [int]$packageCount = 0
-        [int]::TryParse($packageCountMatch, [ref]$packageCount)
+        $packageList = @()
+
+        foreach ($node in $nodes)
+        {
+            # filter out NuProj packages
+            if($node.id -notlike "NuProj*")
+            {
+                $packageList += $node.id
+            }
+        }
 
-        if ($packageCount -gt 0)
+        if ($packageList.length -gt 0)
         {
-            # get packages to update
-            $packageListRaw = [regex]::Match($nukeeperInspect, "(?>possible updates([^$]*)Found)").captures.Groups[1].Value;
-            [array]$packageList = $packageListRaw.Split([Environment]::NewLine, [StringSplitOptions]::RemoveEmptyEntries).Replace([Environment]::NewLine, "")
+            "NuGet packages to update:" | Write-Host -ForegroundColor White
+            $packageList | Write-Host -ForegroundColor White
 
             # restore NuGet packages, need to do this before anything else
             if ($env:APPVEYOR_REPO_BRANCH -like '*release*' -or $env:APPVEYOR_REPO_BRANCH -like '*master*')